15.23 Internet versus cell phones For the countries in the Human Development data file on the book’s website, in 4 countries a higher percentage of people used the Internet than used cell phones, whereas in 35 countries a higher percentage of people used cell phones than the Internet.

a. Show how you could use a nonparametric test to compare Internet use and cell phone use in the population of all countries. State the (i) hypotheses,

(ii) test statistic value, and (iii) find and interpret the P-value.

b. Is the analysis in part a relevant if the 39 countries in the data file are all the countries of interest to you rather than a random sample of countries? Explain.